The box contains:
STK600 starter kit evaluation board
Cables for STK600:
Two 10-wire cables for I/O ports and Parallel mode programming
One 6-wire cable for In-System Programming
Four 2-wire cable for UART and dataflash connections
USB cable
DC power cable
Atmel CD-ROM with datasheets and software
Device board with an ATmega2560 AVR device
Two sets of screws and nuts, and one set of clips